Patch: PR 31018 (and update to 31019)

[Meissner, Michael]

This patch moves all of the TARGET_{K6,K8,PENT,...} etc. out of i386.md
and converts them to feature test macros.  It also has the fix that RTH
requested, eliminating the TUNEMASK/ARCHMASK macros in favor of using
the raw variable.  Note, this means that the changes are based on
-mtune= instead of -march=, so it will generate slightly different code
if you use -mtune=.  I think these changes should have been under tune
rather than arch anyway.

In terms of 31019, I think you can get more savings by changing the
variables to bool's, and doing the test in override_options, so that
instead of doing an AND, you just test a single variable for equality.

--
Michael Meissner
AMD, MS 83-29
90 Central Street
Boxborough, MA 01719

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